
 Originally Posted by 
Lotz-A-Landies
					
				 
				Ben
I may have to consult Boyle on this one, but I'm going along with the notion of the same pressure over larger pistons relates to more effective force on the pads, but I'm sure you would agree that "More force over a larger surface area of friction material equates to more efficient braking."
			
		 
	 
 For the same pressure in the hydraulic lines, the force on the pads is proportional to the piston area, and the frictional braking effect depends only on the pad material and this force*. The only first order effect of pad size is pad life. Heat dissipation is dependent on disc area and ventilation.
*The actual stopping effect also depends on the disc diameter and tyre diameter, plus of course tyre/road friction
John
				
			 
			
		 
			
				
			
			
				John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
			
			
		 
	
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